Method of weaving wire tape for tire beads



May 15, 192s., 1,670,045

y R. C. PIERCE INVENTOR. Kan/Pr 6.' fir/ru'.

ATTORNEY.

BY @LQ-fa Patented May 15, 1928..

UNITE sTATEs Ferarri OFFICE.

EoBERT c. PIERCE.

MENTS, TO AMERICAN CHAIN COMPAN OF BELLEVILLE, NEW JERSEY, ASSIGNOR, BY'.MKESNE ASSIGN- Y, INC., A CORPORATION NEW YORK..

METHOD WEAVING WIRE'TAPE FOR TIRE BEADS.

Original application led February 19, 1923, Serial No. 5319,838.lDivided and this application led December 15, 1925.

My invention comprehends a novel method of Weaving wire tape so that itmay be wound convolutely to produce a triangular bead reinforcement forpneumatic tires in which the convolutions are stepped off or loffset at'intervals to produce the oblique sideof the triangle.

Still another purpose of my invention is to provide a method of weavinga continuous tape from a series of warp wires and a plurality of weftwires so that more than one length of tape may be simultaneously wovenside by side from the same Warp wires, in addition to which each stripis formed with lengths of varying width, or

stepped off so that when the beadreinforcement is Wound it will conform,in a general Way, with the shape of the bead.

The foregoing and other objects and advantages may be obtained throughthe practice set forth in detail in the following description andillustrated in the accompanying drawings.

In the drawings:

Figure 1 is a'diagrammatic view illustrating my method of weaving twolengths of my wire tape side by side and from a plurality of parallelwarp wires;

Figure 2 is a plan view, partly broken away, of one of the lengths oftape obtained through the practice of my method;

Figure 3 is an elevational view, partly in section, showing a tires withmy reinforcement `incorporated therein; and Y Figure 4 is an enlargedtransverse section al view taken on'the line 4-4 of Figure 3.

In the drawings, the numeral 1 designates a straight side bead rin ofstandard form, that is to sayit is su stantially a rightangled trianglein cross-section, and 2 shows my annular Wirer reinforcementincorporated therein.

It will be noted that the reinforcement is constructed from a singlestrip of woven wire and conforms in cross-section to the shape ofthebead ring 1. It comprises a horizontal base Al, a vertical side B,and an oblique side C, so that when it is incorporated in the beadringit projects into each angle thereof.

Heretofore it has been impossible to construct such a reinforcementA ofwoven wire,

so far as I am aware, because it has been im- 'volutely with bead forstraight sidev Serial No. 75,536.

practical to form a triangular structure from such material. Myinvention affords a simple and practical solution of this pr0blemthrough the following practice.

I .construct a continuous fiat tape 3 of woven Warp wires 4 and a weftwire 5 and step off, or offset one edge of the strip at intervalsI toprovide successively narrower` side. The widest portion of each unitcom-l prises the greatest number of -warp wires 4 and forms the base ofthe reinforcement. The number of Wires in this length is determined bythe width of the base A of the bead ring l and also the gage of thewires 4. The tape thus producedis wound conits straight edge 8 formingthe vertical side of the reinforcement to provide a series of superposedlayers.

From the widest of the lengths 6', warp wires 4 are dropped from eachsucceeding length to obtain the proper inclination of the oblique side Cof the reinforcement. The number of warp wires 4 dropped from eachsucceeding length is, of course, determined by the height to which it isdesired to build the reinforcement and this is ldetermined by thecharacter of the bead ring which frequently varies in height in differ.ent types and sizes of tires. In the drawings two warp wires 4 aredropped from each length, but this is illustrative only. The wires 4 arepreferably drawn steel wire and the weft wire 5 is relatively smaller,although wire of other forms and propor- 'tions may be utilized.Obviously a lesser number of layers may be utilized than that necessaryto complete the triangle if it is desired to merely reinforce the baseportion of 'a head and an, unequaly number of wires 4 may be droppedfrom the lengths 6 to alter the contour of the inside face of thereinforcement, all within the spirit of my invention.

In forming my novel tape or strip 3, I propose to use a method by whichtwo strips of tape may be woven side by side from a common series ofwarp wires `4.` Two weft wires 5 are woven, preferably simultaneously,through these wires 4, as shown in Figure 1 of the drawing, to producetwo strips 10 and 11. The wires 5 are first woven into the wires 4 sothat the Widest length of one'strip l() and the narrowest length of theother stripll are side by side, as shown at`12 and 13 respectively. Assucceedin Vlengths of the strips are woven, the desire number of wiresare dropped at intervals by the weft wire 5 of strip 10 and are pickedup by the wire 5 of the strip 11 until, a narrow and wide length havebeen woven at the opposite end of the strips 10 and 11. At this pointthe weft wire 5 of the strip 10 picks up all the wires dropped from saidstrip which brings the weaving operation vback to the starting pointabove described. It will be noted that through this methodtwo strips arereversely woven side by side to produce successively narrower lengths inone strip and successively wider lengths in the other, and the weavingof both strips is accomplished simultaneously with the same series ofwarp wires. At the intervals where' the wires 4 are dropped from onestrip and woven into the other, they are preferably pended claims. Thepresent application is a' division of my copending vapplication Se'-rial No. 619,838, filed February 19, 1928.

- What is claimed is:

1. The method of forming wire tape for making grommets, said methodcomprising, weaving a, weft wire to embrace a series of \warp wires vanddirecting the path of the -weft wire at intervals determined by thecircumference of the grommets to embrace a different number of warpwires.

2-."\The method of forming'wire tape for making grommets, said methodcomprising,

'weaving separate weft wires in individual paths through a common seriesot' warp wires and directing the weft wires at intervals determined bythe circumference of the grommets to respectively embrace a ditferentnumber of warp wires.

3. The method of forming wire tape comprising, simultaneously weavingweft wires into a series of warp wires to form two separate groups ofwarp wires and simultaneously changing the number of warp wires inl eachgroup at intervals throughout the length of the tape and cutting thegroupsl apart. p

4. The method of forming wire tape kcomprising, weaving two `weft wiresinto a se- .ries of warp wires to form separate parallel lengths oftape, directing the path of one weft wire to increase the width of onetape at intervals and simultaneously directing the path of the otherweft wire to decrease the Width of the other tape at similar inter` valsand cutting the tapes apart.

5. The method of forming wire' tape comprising, simultaneously weavingtwo weft wires into a common series of warp wires to form two spacedapart tapes arranged side by side and directing the path of the weftthreads to increase the width of one tape at intervals and decrease thewidth ofthe other at similarintervals and cutting the tapes apart.

6." The method of forming wire tapeiioln prising, weaving two units froma number of warp wires and simultaneously weaving a plurality7V of weftwires through the warp Wires and simultaneously increasing the numbersof warp wires engaged by one weft wire and decreasin by another weftwire and cutting the units apart. v

y ROBERT C. PIERCE.

the warp wires engaged

